The perimeter of a semicircle,
P, is given by
P=π r+2r. If Janice knows the perimeter of her semicircular window, how could she rearrange the formula to find the radius of the window?
a. r= (P-π )/2
b. r= P/π +2
c. r= P/π - 2r/π
d. There is no way to rearrange the formula in terms of the radius, because it is in multiple terms.